How do you replace an expansion valve?
Part 1 of 4: Evacuating the system
- Materials Needed. AC manifold gauge set.
- Step 1: Identify the refrigerant.
- Step 2 Recover the refrigerant.
- Materials Needed.
- Step 1: Locate the expansion valve.
- Step 2: Remove the expansion valve.
- Step 3: Replace the O-rings.
- Step 4 Reconnect the expansion valve.
Where is an expansion valve located?
The expansion valve is situated in the liquid line between the condenser and the inlet of the evaporator. It operates on the opposite side of the system, relative to the compressor.
What are the symptoms of a expansion valve stuck open?
If the expansion valve is stuck open or clogged, the A/C system will not cool properly. A clogged valve will increase the pressure in the system and cause the A/C compressor to overheat. If the valve is stuck open, too much refrigerant is allowed to pass through the system and into the compressor.
What happens when an expansion valve goes bad?
If the AC expansion valve fails or sticks open, it will cause the compressor to pump refrigerant through the vehicle’s AC system, even when it may be undesirable for it to do so. This will put an additional strain on the compressor and associated AC components, making them more susceptible to premature failure.
How long does an expansion valve last?
There isn’t a specific lifespan of the valve, it’s more just a wear and tear kind of situation. Obviously the more you use the air conditioning, the quicker it will wear down. Here’s a look at some of the signs you can watch for that can signal the end of your expansion valve’s lifespan.
How to replace an expansion valve in your car?
How to replace a bad expansion valve in car air conditioning (AC) system. Expansion valve location, inspection, removal and replacement. DIY car repair with Scotty Kilmer, an auto mechanic for the last 42 years. 1. AC PAG Oil: http://amzn.to/2CA2wVm 2. AC Gauges: http://amzn.to/2BIru4v 3. Screwdriver set: http://amzn.to/2j92UCG 4.
How to replace the expansion valve on a refrigera?
1. DISCHARGE REFRIGERANT FROM REFRIGERA– 2. REMOVE BLOWER UNIT 3. REMOVE EVAPORATOR COVER (a) Remove 2 bolts for the liquid and suction tube. (b) Remove 8 screws and evaporator cover. the evaporator and expansion valve.
Can a bad expansion valve cause an AC compressor to run?
AC compressor constantly running. A constantly running compressor is another symptom of a possible problem with the AC expansion valve. If the AC expansion valve fails or sticks open, it will cause the compressor to pump refrigerant through the vehicle’s AC system, even when it may be undesirable for it to do so.
When the expansion valve fails or has any issues, it can cause problems with the functionality and performance of the AC system. Usually a bad or failing AC expansion valve or orifice tube will produce a few symptoms that can alert the driver of a potential issue.